exam Maths Puzzle Numerical Ability

I am having some trouble getting the answer to this problem could someone help me?
A 25in T.V. set has a width of 20in, what is the height of the T.V.?

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exam Other Question
The measure of angle Y is twice the measure of its complement. Find the measure of complement of angle Y. What is the sqrt.of 8x^6 y^4 =

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